Padlock



Oct. 11, 1932.

M. C. MAXWELL PADLOC K Filed May 4, 1929 ATTORNEY Patented Oct. 11, 1 932 UNITED STATES g1,ss1,soa

1 MAXWELL o. MAXWELL, or STAMFORD, eonnnorrounjassrenort ro min fiLEfa TOWNE MANUFACTURING COMPANY; or-smnrronn oonnnorrou'r. 1

simmer:

Application filed May 4, 1929. Serial 'nejeeoaas.

This invention relates to padlocks, more especially padlocks whose casings are made of sheet metal and are designed to be drawn into the particular configuration. desired.- The object of this invention is to design a padlock of this latter type wherein the form of the padlock casing will lenditself easily to sheetmetal fabrication, and where the form of the casing may be utilized to maintain the locking mechanism of the padlock in proper position.

For a detailed description of my invention, I refer to the drawing, wherein Fig. 1 is an elevation of my padlock and Fig. 2 is a section of the same showing the locking mech-' anism in position. Fig. 3 is atop and front View of the plug tube which is adaptedto hold the locking plug of the padlock in position. Fig. 4 is a bottom View of the pad lock showing the position ofthe plug in re lation to the casing. Fig. 5 isa section along the line 5-5 of Fig. 2, showing the locking bolt in its relation to the shackle. Fig. .6 is a front and side View of the locking bolt.

- Fig. 7 is a top, side, and bottom View of the. shank on which the bolt is mounted. Fig. 8

is an end, side, and' front View of the locklng plug. Fig. 9 is a side and front View of thetube adapted to contain the long leg of the padlock shackle; Fig; 10 is a top and side View of a separator adapted to hold two of padlock plates in separated position. Fig. 11 is a side and top View of the top plate of the padlock. Fig. 12 is a side and top View of the upper inside plate of the padlock. Fig. 13 is a side and top View of the second inside plate, while Fig. 14 shows similar Views of the bottom plate. Fig. 15 is a side and end View of the plug retaining slide Referring more particularly to the drawing, it will be noted that the bottom 10 and sides 11 of my padlock casing are formed of one piece of sheet metal, suitably drawn into the particular configuraton shown. The separator plates 13 and 14 shown in Figs. 13 and 14, are adapted to be forced into their positions on the step portions 15 on the inside of the padlock. These separator plates are utilized to support the tubes 16 and 17 shown ,in Figs. 3 and 9, these tubes acting to mainrespecti've positions. v

tain the shackle and the locking plug in their theslots 19 and 20of the plate 13'tohold the tube in position. The shackletube 17 has a long leg 21, which'is adaptedto rest on the; bottom end 10 of the casing. The shoulder portion 2201 the tube is adapted to rest on' the separator plate 14, while the top edge 23 is adapted to support a still further separator plate 12. The tub'e 17 is cut-away at the point 24 and the shackle retaining member 25 shownin Fig. 15 is adapted'to enter into this cut-away portionto prevent tlie'shackle from i being ejected toofarby its ejecting spring 26. In orderto more fully maintain the plate 13 in its-proper position, Iutilize' a plate separator 27 shown in-Fig.10. This member 27" has a projecting portion 28 which is adapted to fit within the cutaway section 29, while its upper edge 30 is adapted to support the top. plate 12. -As described, the other end of this plate restson' the. uppe'r'edge 23 of the shackle tube 17.f' 1 a f' Thetop plate 31 of the padlock casing has bent over'edges 32 which are adapted to be sp rungjinto' the p'adlock casing as shown in Fig. 2 and to bethu's securely held in the" designated position. "If desired, this "top' plate-may "later be 'welded or be further secured in any suit'able'manner. 1'

In order tolock the'padlockshackle se A .curely' within thecasing whenever it"is 'desired, I have provided'the same with locking sectionsat points 335and -34. The rotary bolt 35 is pierced at the point 36 in -ordertha't it maybe securely mounted on the portion 37 oi the boltshank 38.-' This' bolt shank 38 is equipped wit-ha bearing portion39 which rests within the bearing hole 40 of the separator'plate"12. The bottom portion of thebolt shank 38 is equipped "with -'-the up standing lugs41 with which theplug cam 42 is adapted to cooperatel' -y 3" q As shown in Fig. 8, theplug43 carrying the cam 42 may beof any usual type, the sliding, tumbler type being used in .this particular case. It should be understood, how-' ever, that it is'within the scope of this inven'e tion to use any type of locking mechanism,

a Warded mechanism being suitable in some cases; This plug 43 is cut away at 44 to contain a spring retaining member 45. Thus, Whenever, it is desired to assemble this plug in its proper position in the lock casing, it is merely necessary to hold the spring member 45 Within thecut-away portion lkt, and insert the plug into the tube 16. It Will be readily understood that when the spring 45 reaches I the bulging portion 46- of this=tube-itwill spring into the same and will maintain-the plug into its proper position thereafter. .7 The bolt 35 is normally urged into look-' ing position by the coiled spring 47 which.

has one end resting in the hole 48 and has its other end'bearing against'the side of the bolt at the point 49. This spring will nor. mally urge the bolt into locking position as limited. by'studs 50.0n plate 12; The .cam

.42 of-the plug 43 through its. contact with the lugs 4]; of the bolt shank 38 will be adapted to actuate the bolt against the pressure of this spring and into unlocking position. However, because'of the lost motion existingbetween the lugs 41 and the cam 42, it will be possible-to retract the bolt and then return the cylinderlto its locked position to Withdraw the key Without disturbing. the

I I unlocked condition of the padlock.

The operation of my lock is as follows: When a'key is inserted into the plug 43, it will act to set the, tumblers or Willcooperate With-the warded mechanismso that the plug maybe rotated. It Will'then actuate the bolt shank 38, by means of the lugs 41 and the plug cam 42, to rotate the bolt 35 against the action of the spring 47'. This Will remove the bolt from the shackle locking portions 33 and 34 so that the ejecting spring 26 will be capable of shooting the same into its upward unlocking position, the'extent of' this-action beinglimited by the retaining member-25. The plug 43 will then be capable of being rotated back to its locking position due'to the 10st motion existing between the studs" 41 and the cam 42. p The bolt 35 Will remain in its unlocked position, being :held in that position'by thesshackle32 until such time asthat shackle is depressed and the bolt is forced by its spring into the locking portions 33and34. i While I have shown one modification of my invention-,'it should be understood that I do not wish to be limited to the same, since other adaptations within the scope oftheappended claims may suggest themselves to one skilled'in the art.

I claim: 1. In a padlock, a sheet graduated internal steps, a series of plates carried by saidinternal steps, and tubes maintained in position by said plates for supporting the shackle and the" key controlled mechanism ofsaidpadlock.

metal casing havinga configuration comprising a series of lock, adapted to contain a locking plug, and

a series of lateral plates supported by said internal steps-and adapted to support said locking tube.

4. In a padlock, asheetmetal;casing'having integral sides-and bottom, said sides having a configuration comprising a series of internal graduated steps, a lockingtube in said padlock, a shackle containing tube in said padlock, and a series of platesladapted to be supported by said graduatedisteps and perforated for the support of said locking and shackle tubes. p r i I 5. In a padlock, a sheet metal casing having integral sides and bottom, said sides hav-' ing a configuration comprising a series of internal graduated steps, a series of plates adapted to besupported by said internal steps, perforations in said platesand a lock containingtube adapted to restinsaid per-. forations to be supported by said plates. I '6. In a padlock, a sheet metal casing having integral sides of a configuration compris ing a series of internal graduated steps run ning completely about the internal periphery. ofthe casing, a seriesof plates adapted-torest on said steps, and heldin position there: by, and locking mechanism supported bysaid plates and movable relatively thereto for con-. trolling the shackle of said padlock. V

Signed at Stamford in the county of Fairof-May A. D. 1929. r V

\ MAXWELL-C. MAXWELL-1 field and State of Connecticut this, first day 

